// Copyright (c) 2009-2011, Tor M. Aamodt, George L. Yuan
// The University of British Columbia
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// Redistributions in binary form must reproduce the above copyright notice, this
// list of conditions and the following disclaimer in the documentation and/or
// other materials provided with the distribution.
// Neither the name of The University of British Columbia nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#include "gpu-misc.h"

unsigned int LOGB2( unsigned int v ) {
   unsigned int shift;
   unsigned int r;

   r = 0;

   shift = (( v & 0xFFFF0000) != 0 ) << 4; v >>= shift; r |= shift;
   shift = (( v & 0xFF00    ) != 0 ) << 3; v >>= shift; r |= shift;
   shift = (( v & 0xF0      ) != 0 ) << 2; v >>= shift; r |= shift;
   shift = (( v & 0xC       ) != 0 ) << 1; v >>= shift; r |= shift;
   shift = (( v & 0x2       ) != 0 ) << 0; v >>= shift; r |= shift;

   return r;
}
